Пример #1
0
unsigned char* macvdCamera::getFrame()
{
	OSErr   err;
	int		isUpdated = 0;

	if (!vdgIsGrabbing(pVdg)) return NULL;
	 
	if (err = vdgIdle( pVdg, &isUpdated))
	{
		printf("could not grab frame\n");
		return NULL;
	}

	if (isUpdated)
	{
		unsigned char *src = (unsigned char*)pDstData;
		unsigned char *dest = buffer;
		
		switch (colour) {
			case true: {
				uyvy2rgb(width,height,src,dest);
				break;
			}
			case false: {
				uyvy2gray(width,height,src,dest);
				break;
			}
		}
		return buffer;
	}
	
	return NULL;
}
Пример #2
0
unsigned char* V4LinuxCamera::getFrame()  {

	if (cameraID==-1) return NULL;

	int frame = 0;
	v4l_mmap.frame = frame;

	ioctl(cameraID, VIDIOCSYNC, &frame);
	if(ioctl(cameraID, VIDIOCMCAPTURE, &v4l_mmap)<0) {
		stopCamera();
		closeCamera();
		return NULL;
	}
	
	camBuffer = camBuffer + v4l_buf.offsets[frame];	
	
	if (camBuffer==NULL) return NULL;

	switch (colour) {
		case false:
			if (v4l_mmap.format==VIDEO_PALETTE_YUYV) yuyv2gray(this->width, this->height, camBuffer, buffer);
        		else if (v4l_mmap.format==VIDEO_PALETTE_UYVY) uyvy2gray(this->width, this->height, camBuffer, buffer);
        		else if (v4l_mmap.format==VIDEO_PALETTE_YUV420P) return camBuffer;
			return buffer;
			break;
		case true: 
			//ccvt_420p_bgr24(width, height, camBuffer, buffer);
			break;
	}
	 
	return buffer;
}
Пример #3
0
unsigned char* V4Linux2Camera::getFrame()  {

    if (dev_handle<0) return NULL;

    if (ioctl(dev_handle, VIDIOC_DQBUF, &v4l2_buf)<0) {
        running = false;
        return NULL;
    }

    unsigned char *raw_buffer = (unsigned char*)buffers[v4l2_buf.index].start;
    if (raw_buffer==NULL) return NULL;

    if(cfg->color) {
        if (cfg->frame) {
         if (pixelformat==V4L2_PIX_FMT_YUYV)
            crop_yuyv2rgb(cfg->cam_width,raw_buffer,frm_buffer);
         else if (pixelformat==V4L2_PIX_FMT_UYVY)
            crop_uyvy2rgb(cfg->cam_width,raw_buffer,frm_buffer);
         else if (pixelformat==V4L2_PIX_FMT_YUV420) { //TODO
         } else if (pixelformat==V4L2_PIX_FMT_YUV410) { //TODO
         } else if (pixelformat==V4L2_PIX_FMT_GREY)
            crop_gray2rgb(cfg->cam_width,raw_buffer, frm_buffer);
         else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
                int jpegSubsamp;
                tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
                tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_RGB, TJFLAG_FASTDCT);
                crop(cfg->cam_width, cfg->cam_height,cam_buffer,frm_buffer,3);
         }

        } else {
         if (pixelformat==V4L2_PIX_FMT_YUYV)
            yuyv2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
         else if (pixelformat==V4L2_PIX_FMT_UYVY)
            uyvy2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
         else if (pixelformat==V4L2_PIX_FMT_YUV420) { //TODO
         } else if (pixelformat==V4L2_PIX_FMT_YUV410) { //TODO
         } else if (pixelformat==V4L2_PIX_FMT_GREY)
            gray2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
         else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
                int jpegSubsamp;
                tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
                tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_RGB, TJFLAG_FASTDCT);
         }

        }

    } else {
        if (cfg->frame) {
            if (pixelformat==V4L2_PIX_FMT_YUYV)
                crop_yuyv2gray(cfg->cam_width,raw_buffer,frm_buffer);
            else if (pixelformat==V4L2_PIX_FMT_UYVY)
                crop_uyvy2gray(cfg->cam_width,raw_buffer,frm_buffer);
            else if (pixelformat==V4L2_PIX_FMT_YUV420)
                crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
            else if (pixelformat==V4L2_PIX_FMT_YUV410)
                crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
            else if (pixelformat==V4L2_PIX_FMT_GREY)
                crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
            else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {

                int jpegSubsamp;
                tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
                tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_GRAY, TJFLAG_FASTDCT);
                crop(cfg->cam_width, cfg->cam_height,cam_buffer,frm_buffer,1);
            }
        } else {
            if (pixelformat==V4L2_PIX_FMT_YUYV) yuyv2gray(cfg->cam_width, cfg->cam_height, raw_buffer, cam_buffer);
            else if (pixelformat==V4L2_PIX_FMT_UYVY) uyvy2gray(cfg->cam_width, cfg->cam_height, raw_buffer, cam_buffer);
            else if (pixelformat==V4L2_PIX_FMT_YUV420) memcpy(cam_buffer,raw_buffer,cfg->cam_width*cfg->cam_height);
            else if (pixelformat==V4L2_PIX_FMT_YUV410) memcpy(cam_buffer,raw_buffer,cfg->cam_width*cfg->cam_height);
            //else if (pixelformat==V4L2_PIX_FMT_GREY) memcpy(cam_buffer,raw_buffer,cam_width*cam_height);
            else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {

                int jpegSubsamp;
                tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
                tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_GRAY, TJFLAG_FASTDCT);
            }
        }
    }

    if (-1 == ioctl (dev_handle, VIDIOC_QBUF, &v4l2_buf)) {
        printf("cannot unqueue buffer: %s\n", strerror(errno));
        return NULL;
    }

    if (cfg->frame) return frm_buffer;
    else if ((!cfg->color) && (pixelformat==V4L2_PIX_FMT_GREY)) return raw_buffer;
    else return cam_buffer;
}